【题目】A red light is often used as a danger ________.
A. signB. signal
C. signatureD. symbol
在线课程【答案】B
【解析】
考查名词词义辨析。句意：红灯常被用作危险的信号。A. sign符号；B. signal信号；C. signature签名；D. symbol象征。根据句意和常识可知，红灯是一种信号，故选B。
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A red light is often used as a danger .A. signB. signalC. signatureD. symbol
编辑：chaxungu时间：2026-04-27 02:51:43分类：高中英语题库
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